US5924770A - Chair construction - Google Patents
Chair construction Download PDFInfo
- Publication number
- US5924770A US5924770A US09/079,724 US7972498A US5924770A US 5924770 A US5924770 A US 5924770A US 7972498 A US7972498 A US 7972498A US 5924770 A US5924770 A US 5924770A
- Authority
- US
- United States
- Prior art keywords
- connector
- chair
- inturned
- tabs
- leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C5/00—Chairs of special materials
- A47C5/12—Chairs of special materials of plastics, with or without reinforcement
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/12—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats with shell-shape seat and back-rest unit, e.g. having arm rests
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C5/00—Chairs of special materials
- A47C5/04—Metal chairs, e.g. tubular
- A47C5/06—Special adaptation of seat upholstery or fabric for attachment to tubular chairs
Definitions
- the present invention relates generally to furniture. More particularly, the invention concerns a chair construction having novel means for connecting of the molded plastic seat and back portions of the chair to a uniquely configured tubular supporting frame.
- the thrust of the present invention is to overcome the drawbacks of the prior art utility chairs as discussed in the preceding paragraphs by providing a uniquely constructed, highly attractive, comfortable and durable utility chair. More particularly, the invention is directed to providing a utility chair in which the seat and back portions are connected to the structural frame in a highly novel manner which permits easy and straight forward fabrication and assembly of the chair at relatively low cost.
- the Rowland chair is a stacking chair having a bent rod structural support frame and a separate seat and back portions which are interconnected with the supporting frame in a traditional fashion.
- the Cowen chair construction comprises a tubular steel support frame onto which a molded plastic shell is interconnected.
- the integrally molded plastic shell provides a curved back rest member, and a integrally formed seat member.
- the chair is supported on substantially "U" shaped tubular leg members which are secured to the molded shell by metal brackets and conventional fasteners.
- U.S. Pat. No. 2,857,958 issued to Wright discloses another common type of prior art desk chair construction.
- the Wright chair includes a tubular steel support frame to which seat and back portions are interconnected by rivets.
- a tablet arm which includes a generally horizontally disposed tablet, is connected to one side of the tubular frame construction and extends upwardly from the seat portion of the chair.
- Another object of the invention is to provide a chair of the aforementioned character in which an integrally molded plastic shell is uniquely interconnected with a rugged steel supporting frame in a manner which simplifies manufacture of the chair and at the same time produces a durable construction which can withstand continuous, normal classroom type use.
- Another object of the invention is to provide a chair construction as described in the preceding paragraph in which the tubular supporting structure includes uniquely formed upper side portions which are interconnected with the back support of the molded plastic shell in a highly novel manner using a specially designed tube end connector mechanism.
- Another object of the invention is to provide a method of making a chair of the class described which comprises a molded one piece shell that includes integrally molded connector tabs to which the tubular steel supporting frame of the chair is connected by means of uniquely designed connector mechanisms.
- Another object of the invention is to provide a chair construction of the character described which includes a novel, upstanding tablet arm that is interconnected at one side of the tubular steel support structure.
- Another object of the invention is to provide a durable and attractive utility chair and the method of making the chair which is highly cost effective so that the chair can effectively compete in the market place with prior art chairs of the same general character.
- FIG. 1 is generally perspective view of one form of the utility chair construction of the present invention.
- FIG. 1A is a generally perspective view of the supporting frame of the chair construction shown in FIG. 1 without the tablet arm.
- FIG. 1B is a generally perspective view of the supporting frame of the chair construction shown in FIG. 1 including the tablet supporting frame segment.
- FIG. 2 is a side elevational view of the chair construction shown in FIG. 1.
- FIG. 3 is a front elevational view of the chair construction.
- FIG. 4 is a rear view of the construction showing the manner in which the upper end portions of the chair arms are interconnected with the back of the molded plastic support shell.
- FIG. 5 is a bottom plan view of the chair construction shown in FIG. 1.
- FIG. 6 is an enlarged cross-sectional view taken along lines 6--6 of FIG. 3.
- FIG. 9 is a greatly enlarged cross-sectional view taken along lines 9--9 of FIG. 3.
- FIG. 9A is an enlarged generally perspective view of the expansion plug of the connector mechanism shown in FIG. 9.
- FIG. 9B is an enlarged, generally perspective view of the screw head coupler of the right connector assembly of the invention.
- FIG. 9C is a generally perspective view of the screw head coupler of the left connector assembly of the invention.
- FIG. 11 is a greatly enlarged cross-sectional view taken along lines 11--11 of FIG. 2.
- FIG. 12 is a generally perspective, rear view of a portion of the molded plastic shell portion of the chair of the present invention showing the integrally molded connector tabs to which the tubular supporting frame is connected.
- the chair construction here comprises a supporting frame 14 having first and second sides 14a and 14b which are constructed of strategically bent metal tubing.
- Each of the sides 14a and 14b comprise a front leg 16 having a lower extremity 16a and an upper extremity 16b.
- Each upper extremity 16b include an inturned, rearwardly extending portion 17.
- Side portions 14a and 14b also include a rear leg 18 having a lower extremity 18a and an upper extremity 18b.
- Each of the upper extremities 18b includes an inturned, transversely extending portion 19 the purpose of which will presently be described.
- upper portions 18b of each side 18 comprise an arm rest which, as best seen in FIG. 1, is elevated from the seat portion 20a of a uniquely formed plastic molded, polypropylene shell 20, which, in a manner presently to be described, is securely interconnected with supporting frame 14 in a highly novel manner.
- the chair construction of the present form of the invention can be seen to also include a transversely extending cross bar assembly 22 which comprises an elongated cross bar 22a having at either end thereof a leg connector assembly 22b.
- Connector assembly 22b includes a generally ring shaped, segmented portion 22c which circumscribes each of the legs 18 at an intermediate location 18c. Integrally formed with ring shaped portion 22c are outwardly extending, yieldably deformable wing like members 22d. Wing like members 22d initially extend angularly outwardly from ring shaped portion 22b in the manner shown in FIG. 10A, but when urged together in the manner shown in FIG.
- cross bar assembly 22 further includes a curved, generally plate like central portion 22e to which a generally triangular shaped base plate 26 is interconnected.
- Base plate 26 which is preferably constructed from a thin metal sheet, has a front edge portion 26a and angularly shaped rear portion 26b which is interconnected with portion 22e of cross bar assembly 22 by suitable fasteners 27 in the manner shown in FIG. 5.
- the angularly extending side portions of the base plate are suitably connected to rearwardly extending frame portions 17 as by spot welding.
- the molded shell 20 which is secured to and supported by support frame 14.
- the molded shell includes the previously mentioned seat portion 20a as well as an integrally formed, upwardly extending back portion 20b which is provided with a finger grip opening 20c (FIG. 1).
- seat portion 20a includes a lower surface 21 which is provided with a transversely extending, integrally molded connector apron, 30.
- Connector apron 30 extends downwardly and rearwardly from the front edge of the seat portion of the molded shell so that it can be interconnected with base plate 26 by a plurality of transversely spaced apart connectors such as rivets 32.
- a particularly unique aspect of the chair construction of the present inventions resides in the configuration of back portion 20b of molded shell 20.
- the rear surface 20c of back portion 20b is provided with first and second sets 34 and 36 of transversely spaced apart connector tabs 38.
- Connector tabs 38 are integrally formed with back portion 20b and extend outwardly from the rear surface 20c thereof in the manner best seen in FIG. 12.
- Each set of connector tabs includes three adjacent tabs 38, each of which is provided with a generally centrally located opening 40. (FIG. 12)
- Each set 34 and 36 of connector tabs also includes an inboard connector tab 42 which is provided with a reduced diameter aperture 44 the purpose of which will presently be described.
- the integral polypropylene supporting shell 20 is molded by a conventional injection molding process which forms integral connector tab sets 34 and 36.
- apertures 40 and 44 are formed in the connector tabs in a manner well understood by those skilled in the art. More particularly, apertures or openings 40 are strategically formed so that they will closely receive the inturned, transversely extending terminal portions 19 of legs 18. Portions 19 are securely connected with connector tab sets 34 and 36 in any suitable manner as, by way of example, using leg connector means of the character next to be described.
- the leg connector means for interconnecting end portions 19 of rear legs 18 to connector tabs set 34 and 36 comprise two identical connector assemblies 45 of the construction shown in FIGS. 9, 9A, 9B, and 9C. More particularly, each connector assembly 45 comprises a connector element 46 (FIG. 9A) which in the manner shown in FIG. 9 is internally disposed within the open end portions of each of the inturned end portions 19 of each of the rear legs 18. As shown in FIG. 1A, each of the inturned end portions 19 is provided with a slot like opening 48 through which an outwardly extending locking protuberance 46a formed on each of the connector elements 46 lockably extends.
- Each inturned end portion 19 also includes an indexing notch-like opening 49 (FIGS. 1A and 9), which guidably receives an indexing protuberance 46b formed proximate the end of each of the connector elements 46 (FIG. 9A).
- connector assemblies 50 Also forming a part of the leg connector means of the invention are connector assemblies 50.
- Each connector assembly 50 includes a bolt-like member 50a, the shank portion 51 of which is threadably receivable within slots 46c formed in each of the connector elements 46 (FIGS. 9 and 9A).
- Each threaded connector assembly 50 also includes a generally disk shaped head portion 52 (FIGS.
- back portion 20b of the plastic support shell 20 is interconnected with portions 19 of legs 18 of the support frame by first introducing each of the end portions 19 into openings 40 of each of the connector tab sets 34 and 36.
- Connector elements 46 are first inserted into the open ends of tubular portions 19 so that indexing protuberances 46b align with openings 49 and then the end portions are inserted into the connector tabs in the manner shown in FIG. 9. With this construction, when the connector elements seat within portions 19, protuberances 46a will align with slots 48 formed in the tubular portions 19. Next the bolt-like members 50a are threadably interconnected with connector elements 46 by rotation of members relative to each of the elements 46.
- members 50a As members 50a enter the slot like openings 46c of connector elements 46, they will expand the central portions of the elements outwardly so as to lockably force protuberance 46A into slots 48. Additionally, as the connectors 50 are cinched down, the tapered surfaces 52a of the head portions 52 will be brought into pressural engagement with surfaces 42a of each of the inboard tabs 42 of tab sets 34 and 36 (see also FIGS. 9B and 9C). With members 50a suitably cinched down against tabs 42 and with protuberances 46A locked into slots 48, portions 19 of the rear legs of the supporting frame will be securely interconnected with the outwardly extending connector tab sets 34 and 36 so as to support the molded shell in the proper position on the supporting frame 14.
- base plate 26 which is interconnected with support frame 14 in the manner shown in FIG. 1A is also connected to supporting shell 20 in the manner best seen FIGS. 6, 7, and 8. More particularly, the forward portion of support shell 20 is interconnected with base plate 26 by a plurality of connectors 32 which interconnect a downwardly curved, rearwardly extending apron 30 formed on the molded plastic shell with the forward edge 26a of the base plate (see also FIG. 5). As best seen in FIGS. 8, 8A, and 8B the rearward portion of seat 20a is uniquely, cushionably supported by flexible cross bar assembly 22 by a novel plastic bumper 56 and is securely interconnected with the angularly shaped rear portion 26b of plate 26 by a plurality of connectors 27. (See FIGS.
- Bumper 56 is disposed intermediate cross-member assembly 22 and the bottom surface 21 of plastic support shell 20.
- bumper member 56 can be constructed of various yieldably, deformable materials such as plastic, rubber, and other elastomers, and preferably extends transversely of seat portion 20a by a distance approximating the width of the curved central portion 22e of cross bar assembly 22 (see FIG. 8B).
- ground engaging sled base members 60 which interconnect forward and rearward legs 16 and 18 of each side frame 14a and 14b in the manner best seen in FIGS. 1 and 1A.
- ground engaging members 60 form an integral part of the strategically bent tubular support frame 14 which comprises the tubular sides 14a and 14b.
- ground engaging shaped guides 62 are preferably provided on each of the ground engaging sled base members 60.
- each of the ground engaging members 60 is provided with a pair of longitudinally spaced apart openings 60a which closely receive an outwardly extending, tongue like portion 64a of a molded plastic guide 64.
- each of the body portion 64 of each of the glides includes a flat ground engaging surface 64a and a pair of transversely spaced apart side portions 64b which partially circumscribe the lower curved outer surfaces 60a of each of the ground engaging members 60.
- Members 64 can be molded from any suitable moldable plastic such as polycarbonate in a manner well known to those skilled in the art.
- the chair construction also includes a tablet arm assembly 66.
- Tablet arm assembly 66 comprises a strategically bent tubular support member 68 having the end portion 68a thereof affixed to upper portion 18b of a selected one of the rear legs 18 (see FIG. 1B).
- Member 68 also includes an intermediate portion 68b which is interconnected to a tablet member 70 by means of a pair of generally "U" shaped brackets 72 allowing the tablet arm to articulate allowing for ease of entry and exit and allowing chairs to be stacked (FIG. 5).
- tablet arm assembly 66 is shown interconnected with the right side frame of the tubular support structure and presents a smooth, slightly angularly upwardly extending writing surface 70a which can be used by a student for supporting work papers and the like. It is to be understood that a similarly constructed tablet arm assembly could be affixed to the left hand side of the frame for use by left handed students.
- Tablet 70 can be constructed of a variety of materials, but preferably comprises a particle board core to which top and bottom plastic sheets are connected to provide a smooth writing surface 70a.
Landscapes
- Chairs Characterized By Structure (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/079,724 US5924770A (en) | 1998-05-15 | 1998-05-15 | Chair construction |
US09/363,695 US6116692A (en) | 1998-05-15 | 1999-07-28 | Chair construction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/079,724 US5924770A (en) | 1998-05-15 | 1998-05-15 | Chair construction |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/363,695 Division US6116692A (en) | 1998-05-15 | 1999-07-28 | Chair construction |
Publications (1)
Publication Number | Publication Date |
---|---|
US5924770A true US5924770A (en) | 1999-07-20 |
Family
ID=22152395
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/079,724 Expired - Lifetime US5924770A (en) | 1998-05-15 | 1998-05-15 | Chair construction |
US09/363,695 Expired - Lifetime US6116692A (en) | 1998-05-15 | 1999-07-28 | Chair construction |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/363,695 Expired - Lifetime US6116692A (en) | 1998-05-15 | 1999-07-28 | Chair construction |
Country Status (1)
Country | Link |
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US (2) | US5924770A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1284113A2 (en) * | 2001-08-09 | 2003-02-19 | Arper S.p.A. | Chair |
US6634717B2 (en) * | 2001-11-15 | 2003-10-21 | Fursys Incorporation | Tilting chair |
US6722735B2 (en) | 2001-04-16 | 2004-04-20 | Ditto Sales, Inc. | Chair with synchronously moving seat and seat back |
US20050104421A1 (en) * | 2003-05-16 | 2005-05-19 | Astle Robert A. | Chair |
US20060103198A1 (en) * | 2004-08-05 | 2006-05-18 | Thomas Dettmann | Music posture chairs |
US20100244515A1 (en) * | 2009-03-31 | 2010-09-30 | Dragomir Ivicevic | Reclining Chair |
US20120306240A1 (en) * | 2011-06-03 | 2012-12-06 | Knoll, Inc. | Chair Having Moveable Tablet |
US20140077573A1 (en) * | 2011-05-20 | 2014-03-20 | Ass-Einrichtungssysteme Gmbh | Seat shell for seating furniture |
US9504326B1 (en) | 2012-04-10 | 2016-11-29 | Humanscale Corporation | Reclining chair |
US20220295996A1 (en) * | 2021-03-18 | 2022-09-22 | Pro-Cord S.P.A. | Chair with pivoting seat and backrest |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1410740B1 (en) * | 2002-10-15 | 2005-01-19 | Sedus Stoll AG | Component for a chair |
US7111906B2 (en) * | 2003-05-22 | 2006-09-26 | Cosco Management, Inc. | Flexible seat mount for chair seat bottom |
US6709060B1 (en) * | 2003-07-03 | 2004-03-23 | Tung-Hua Su | Chair backrest |
US7806473B1 (en) | 2005-11-21 | 2010-10-05 | Faiks Frederick S | Stackable chair and framework therefor |
US7591511B2 (en) | 2005-12-12 | 2009-09-22 | Mity-Lite, Inc. | Tamper resistant attachment device for a chair backrest |
DE102006018951A1 (en) * | 2006-04-24 | 2007-11-08 | Sedus Stoll Ag | Device for backrest attachment |
US8317269B2 (en) | 2008-12-24 | 2012-11-27 | Mity-Lite, Inc. | Mesh stacking chair |
US8454093B2 (en) | 2008-12-24 | 2013-06-04 | Mity-Lite, Inc. | Mesh chair with open-end hoop |
US8322787B2 (en) | 2008-12-24 | 2012-12-04 | Mity-Lite, Inc. | Clamping joint for a chair |
US8033612B2 (en) | 2008-12-24 | 2011-10-11 | Mity-Lite, Inc. | Comfortable mesh folding chair |
USD648554S1 (en) | 2009-11-04 | 2011-11-15 | Mity-Lite, Inc. | Mesh stacking chair |
USD660612S1 (en) | 2010-11-16 | 2012-05-29 | Mity-Lite, Inc. | Mesh banquet chair |
USD801097S1 (en) | 2016-01-13 | 2017-10-31 | Paragon Furniture, Inc. | Chair shell |
USD809315S1 (en) | 2016-01-13 | 2018-02-06 | Paragon Furniture, Inc. | Chair |
USD808678S1 (en) | 2016-01-13 | 2018-01-30 | Paragon Furniture, Inc. | Chair |
USD808677S1 (en) | 2016-01-13 | 2018-01-30 | Paragon Furniture, Inc. | Chair |
USD818732S1 (en) | 2016-01-13 | 2018-05-29 | Paragon Furniture, Inc. | Chair shell |
USD802348S1 (en) | 2016-01-13 | 2017-11-14 | Paragon Furniture, Inc. | Chair shell |
USD801096S1 (en) | 2016-01-13 | 2017-10-31 | Paragon Furniture, Inc. | Chair shell |
Citations (5)
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US3387887A (en) * | 1966-06-09 | 1968-06-11 | Schlumberger Ltd | Chair |
US4609225A (en) * | 1985-01-17 | 1986-09-02 | Loucks Harry D | Folding chair with membrane shell |
US5080313A (en) * | 1989-04-24 | 1992-01-14 | Newport News Shipbuilding And Dry Dock Company | Pipe to plate connection |
US5104192A (en) * | 1990-01-23 | 1992-04-14 | Gianfranchi Pier L | Structure for chairs, small armchairs and the like with means for completion in diversifiable versions |
US5123702A (en) * | 1990-10-24 | 1992-06-23 | Shelby Williams Industries, Inc. | Interaction-high density stacking chair |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4305617A (en) * | 1979-05-14 | 1981-12-15 | Interroyal Corp. | Chair construction |
-
1998
- 1998-05-15 US US09/079,724 patent/US5924770A/en not_active Expired - Lifetime
-
1999
- 1999-07-28 US US09/363,695 patent/US6116692A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3387887A (en) * | 1966-06-09 | 1968-06-11 | Schlumberger Ltd | Chair |
US4609225A (en) * | 1985-01-17 | 1986-09-02 | Loucks Harry D | Folding chair with membrane shell |
US5080313A (en) * | 1989-04-24 | 1992-01-14 | Newport News Shipbuilding And Dry Dock Company | Pipe to plate connection |
US5104192A (en) * | 1990-01-23 | 1992-04-14 | Gianfranchi Pier L | Structure for chairs, small armchairs and the like with means for completion in diversifiable versions |
US5123702A (en) * | 1990-10-24 | 1992-06-23 | Shelby Williams Industries, Inc. | Interaction-high density stacking chair |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6722735B2 (en) | 2001-04-16 | 2004-04-20 | Ditto Sales, Inc. | Chair with synchronously moving seat and seat back |
US20040108761A1 (en) * | 2001-04-16 | 2004-06-10 | Roberto Lucci | Chair with synchronously moving seat and seat back |
US6935690B2 (en) | 2001-04-16 | 2005-08-30 | Ditto Sales, Inc. | Chair with synchronously moving seat and seat back |
EP1284113A3 (en) * | 2001-08-09 | 2004-01-02 | Arper S.p.A. | Chair |
EP1284113A2 (en) * | 2001-08-09 | 2003-02-19 | Arper S.p.A. | Chair |
US6634717B2 (en) * | 2001-11-15 | 2003-10-21 | Fursys Incorporation | Tilting chair |
US7452035B2 (en) * | 2003-05-16 | 2008-11-18 | Lifetime Products, Inc. | Chair |
US20050104421A1 (en) * | 2003-05-16 | 2005-05-19 | Astle Robert A. | Chair |
WO2005041722A3 (en) * | 2003-05-16 | 2005-10-20 | Lifetime Prod Inc | Chair |
US20060103198A1 (en) * | 2004-08-05 | 2006-05-18 | Thomas Dettmann | Music posture chairs |
US7275788B2 (en) * | 2004-08-05 | 2007-10-02 | Wenger Corporation | Music posture chairs |
US20100244515A1 (en) * | 2009-03-31 | 2010-09-30 | Dragomir Ivicevic | Reclining Chair |
US20140077573A1 (en) * | 2011-05-20 | 2014-03-20 | Ass-Einrichtungssysteme Gmbh | Seat shell for seating furniture |
US20120306240A1 (en) * | 2011-06-03 | 2012-12-06 | Knoll, Inc. | Chair Having Moveable Tablet |
US8628142B2 (en) * | 2011-06-03 | 2014-01-14 | Knoll, Inc. | Chair having moveable tablet |
US9504326B1 (en) | 2012-04-10 | 2016-11-29 | Humanscale Corporation | Reclining chair |
US20220295996A1 (en) * | 2021-03-18 | 2022-09-22 | Pro-Cord S.P.A. | Chair with pivoting seat and backrest |
US11857084B2 (en) * | 2021-03-18 | 2024-01-02 | Pro-Cord S.P.A. | Chair with pivoting seat and backrest |
Also Published As
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US6116692A (en) | 2000-09-12 |
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